FLOWER: April–July. Large, bell-shaped flowers have 3 lilac to whitish petals, each 1 1/4–1 3/8-inch long (3–4 cm) with a large, yellow band around the base. The band surrounds a rounded, orange gland with short hairs above a small purple basal spot; the 6 anthers are narrow with sharp points. Fruit is an erect, 3-angled capsule.